code: def _dot(x, y):
      return tf.reduce_sum(x * y, -1)
  
file_path: lucid/lucid/optvis/objectives_util.py
imports: from __future__ import absolute_import, division, print_function
  from decorator import decorator
  import numpy
  import tensorflow
  import lucid.misc.graph_analysis.property_inference
label_desc: Use image node_id 1 for calling a global function with example usage: _dot(x, y) and returns: tf